illustrates use of BufferedStreams : BufferedStream : File Stream C# Source Code

    

/*
Mastering Visual C# .NET
by Jason Price, Mike Gunderloy

Publisher: Sybex;
ISBN: 0782129110
*/

 /*
  Example15_14.cs illustrates use of BufferedStreams
*/

using System;
using System.Windows.Forms;
using System.IO;

public class Example15_14 
{
    [STAThread]
  public static void Main() 
  {

    // use an open file dialog to get a filename
    OpenFileDialog dlgOpen = new OpenFileDialog();
    dlgOpen.Title="Select file to back up";

    if (dlgOpen.ShowDialog() == DialogResult.OK)
    {
      // create the raw streams
      FileStream inStream = File.OpenRead(dlgOpen.FileName);
      FileStream outStream = 
        File.OpenWrite(dlgOpen.FileName + ".bak");

      // add a buffering layer
      BufferedStream bufInStream = new BufferedStream(inStream);
      BufferedStream bufOutStream = new BufferedStream(outStream);

      byte[] buf = new byte[4096];
      int bytesRead;

      // copy all data from in to out via the buffer layer
      while ((bytesRead = bufInStream.Read(buf, 0, 4096)) > 0)
        bufOutStream.Write(buf, 0, bytesRead);

      // clean up
      bufOutStream.Flush();
      bufOutStream.Close();
      bufInStream.Close();
      outStream.Close();
      inStream.Close();

    }

  }

}